Theoretically, there is an aesthetic concept in calligraphy that "horses can move through sparse places, and wind can't pass through dense places." That is to say, horses can gallop in sparse places, and even wind can't penetrate in dense places. Generally speaking, It refers to the structure, layout, blank space, organization, and echo between words and words. Of course, this is just the high opinion of the Fang family. Isn’t it something we can achieve, hahahaha